diff --git a/uisimulator/sdl/button-x11.c b/uisimulator/sdl/button-x11.c
index 5fda7cf45a..7c41f24cc8 100644
--- a/uisimulator/sdl/button-x11.c
+++ b/uisimulator/sdl/button-x11.c
@@ -166,6 +166,8 @@ void button_read (void)
         case SDLK_8:
 #ifdef BUTTON_UP
             k = BUTTON_UP;
+#elif defined BUTTON_SCROLL_BACK
+            k = BUTTON_SCROLL_BACK;
 #elif defined BUTTON_PLAY
             k = BUTTON_PLAY;
 #endif
@@ -176,6 +178,8 @@ void button_read (void)
         case SDLK_2:
 #ifdef BUTTON_DOWN
             k = BUTTON_DOWN;
+#elif defined BUTTON_SCROLL_FWD
+            k = BUTTON_SCROLL_FWD;
 #elif defined BUTTON_STOP
             k = BUTTON_STOP;
 #endif